Force Vera refresh after starting subscription

[pavoni]

Proposed change

Sometimes vera devices don't correctly initialise HA on startup.

The problem is that vera uses subscriptions to do updates, but sometimes on startup HA devices are created after the subscription engine is started and so miss the initial state callback. My previous attempt to solve this by delaying the start of the subscription thread didn't completely fix the problem(#45535). Although the code rearrangement there is fine.

This is a more complete approach - having each device request a refresh after it starts it's own subscription.

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New integration (thank you!)
• New feature (which adds functionality to an existing integration)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Additional information

• This PR fixes or closes issue: fixes #
• This PR is related to issue:
• Link to documentation pull request:

Checklist

• The code change is tested and works locally.
• Local tests pass. Your PR cannot be merged unless tests pass
• There is no commented out code in this PR.
• I have followed the development checklist
• The code has been formatted using Black (black --fast homeassistant tests)
• Tests have been added to verify that the new code works.

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated for www.home-assistant.io

If the code communicates with devices, web services, or third-party tools:

• The manifest file has all fields filled out correctly.
  Updated and included derived files by running: python3 -m script.hassfest.
• New or updated dependencies have been added to requirements_all.txt.
  Updated by running python3 -m script.gen_requirements_all.
• Untested files have been added to .coveragerc.

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To help with the load of incoming pull requests:

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[probot-home-assistant]

Hey there @vangorra, mind taking a look at this pull request as its been labeled with an integration (vera) you are listed as a codeowner for? Thanks!
_{^{(message by CodeOwnersMention)}}

[MartinHjelmare]

Looks good!